Largest public system
- City of Lincolnton: TTHM (disinfection byproducts)
- 64 ppb
- Highest running annual average (2025); federal limit 80 ppb.
- City of Lincolnton, 2025
- City of Lincolnton: HAA5 (disinfection byproducts)
- 45 ppb
- Highest running annual average (2025); federal limit 60 ppb.
- City of Lincolnton, 2025
- City of Lincolnton: Lead (at sampled homes' taps)
- Not detected
- Not detected (2023); 2 sampled homes above the action level. The federal action level is 15 ppb.
- City of Lincolnton, 2025